You are viewing an outdated report. The latest version of this report was published on June 1st, 2020

DNS Site Operator

May 1st, 2019

This report details the names and locations of all DNS servers
on the internet, as well as the number of domains that are serviced
by these servers. In this fashion, we can discover

the number of sites hosted by ISPs

the number of sites hosted by hosting companies that use an ISP's
facilities, but run their own name servers

the number of sites hosted by specialty DNS service providers

the organizations that choose to operate their own DNS servers
rather than to use those of their ISP/hosting provider.

The survey works by determining each month the authoritative name
server for each host (and more accurately, each domain) in our
survey. We then count the number of domains hosted on each
DNS server.

Search

Curious about the size of a the domain set handled by a particular
ISP's name servers? Try searching for the ISP's name server. For example,
to find Exodus' name servers, try exodus.

Top 20 by Host Name

The top 20 name servers ranked according to the number of domains
handled by each name server, with a name server uniquely identified
by its fully qualifed name, are shown below.

Name Server Name

Name Server IP

Domains

ns1.bluehost.com

162.159.24.80

357,926

ns2.bluehost.com

162.159.25.175

357,914

dns2.technorail.com

62.149.132.2

299,910

dns.technorail.com

62.149.128.2

299,909

dns4.arubadns.cz

81.2.199.73

299,524

dns3.arubadns.net

95.110.220.5

299,523

ns1.dreamhost.com

64.90.62.230

283,167

ns2.dreamhost.com

208.97.182.10

283,163

ns3.dreamhost.com

66.33.205.230

283,063

ns01.one.com

195.206.121.10

247,492

ns02.one.com

195.206.121.138

247,491

f1g1ns2.dnspod.net

101.226.220.16

230,935

f1g1ns1.dnspod.net

111.161.57.77

230,695

ns1.dns.ne.jp

61.211.236.1

228,765

ns2.dns.ne.jp

133.167.21.1

228,752

jm1.dns.com

121.14.154.246

228,427

jm2.dns.com

121.14.154.247

228,427

ns5.kasserver.com

85.13.128.3

225,387

ns6.kasserver.com

85.13.159.101

225,374

ns.namespace4you.de

80.67.16.124

209,490

Survey Limitations

Our survey, while having an impressive 70,509,447
sites and 29,497,990 domains in the
data set, does not include all web sites and domains. We only include those
that we consider active, which, by our definition, means
we found the site via a link from somewhere else. Sites not linked
by anyone are by definition not included in the survey.

We also actively drop sites out of the survey that fail to respond
3 consecutive months to our HTTP queries. So, while a DNS server
might still respond with information for a domain, if there is no
active web site that we can reach for the domain in question,
then the domain is not included in this survey at all, even if it
still has other functioning services (such as email).